nRF Power Profiler Dropping samples

[Livid]

I'm trying to do a power analysis of an embedded device with a PPK2 and nRF power profiler and i'm running into an issue where i'm losing samples on longer capture periods. It's set to a 10kHz sample rate but after running it for 2 minutes at this sasmple rate and exporting the csv file it's ~400k records long, when it should be ~1200k records long. Looking manually at the CSV files i can see that it's missing multiple milliseconds of samples very frequently

I first thought it was a RAM issue, so i make sure to close every extra program and only have the power profiler software running but the issue still presented. I also tried to downgrade to 3.5.5 and tried the latest beta 4.0.0 b6 but neither of those have fixed the issue. This is causing significant problems for my data analysis

Fullscreen nrfconnect-system-report-2024-01-25T13-39-10.684Z.txt Download

# nRFConnect System Report - 2024-01-25T13-39-10.684Z

- System:     Dell Inc. Latitude 7390 2-in-1
- BIOS:       Dell Inc. 1.29.1
- CPU:        1 x Intel Core™ i7-8650U 1.9 GHz 8 cores (4 physical)
- Memory:     2.1 GB free of 15.5 GB total
- Filesystem: /dev/mapper/data-root (ext4) 464.4 GB 48.7% used

- OS:         elementary (6.1 Jólnir) linux x64

- Versions
    - kernel: 5.15.0-91-generic
    - git: 2.25.1
    - node: 16.17.1
    - python: 2.7.18
    - python3: 3.8.10
    - nrf-device-lib-js: 0.6.12
    - nrf-device-lib: 0.15.3
    - nrfjprog DLL: 10.19.1
    - JLink: JLink_V7.82c

- Connected devices:
    - 9195100 : /dev/ttyACM0
    - D643BFF1D92B : /dev/ttyACM1

- Current device:
    - name:          PPK2
    - serialNumber:  D643BFF1D92B
    - cores:         Unknown
    - website:       https://www.nordicsemi.com/Software-and-tools/Development-Tools/Power-Profiler-Kit-2

[Priyanka]

Hi,

Could you share a screenshot of your power profiler settings on the left of the window, say, sampling parameters etc. ?

Regards,

Priyanka

[Livid]

[Priyanka]

Hi,

Could you provide the following details:

1. Is data loss happening all the time? If not, is it possible to share the CPU usage when this occurs?

2. Do you have a USB HUB or many USB devices connected to the system when the issue occurs?

Regards,

Priyanka

[Livid]

The data loss happens after 1~2 minutes of recording. No significant number of USB devices are connected. Overall CPU usage is low, please see screenshot. 

[Livid]

It seems to be connected to whether my DUT is powered on, but i'm using an external power supply so there should be no interaction between the two devices

[Priyanka]

Thank you for the information. We are looking into this.

-Priyanka

[Priyanka]

Hi,

This issue is now fixed.

-Priyanka